A Kuwaiti man has pleaded with the security authorities to arrest him, explaining that he feared he would harm himself and his family.

"I follow the Daesh ideology and I am concerned that I would be pressed to commit a crime against myself or my family," the man told the police on the phone, Kuwaiti daily Al Watan reported on Monday.

A patrol was sent by a security agency to the home of the caller in the Subahiya area and detained him, the daily added.

An investigation was launched to understand how the man, in his 30s, was influenced by the Daesh ideology and propaganda and to assess the level of his relationship with the extremist group or those who support it.

Kuwait is still trying to come to terms with the murder on Friday of a young man by his brother at their diwaniya, a private community hall in their home.

The father reportedly discovered the crime and reported it to the police. The ensuing investigation revealed that he had been murdered by his brother.

A source told Kuwaiti daily Al Qabas that the murderer confessed that he killed his brother because he did not perform regular prayers and that he was not religious.

In neighbouring Saudi Arabia, two twin brothers, 20, were arrested after they stabbed their mother to death and critically injured their mother and older sibling.

The murders are seen by security experts as a strong indication that Daesh affiliates have now reached the stage of willingly killing their parents, siblings or relatives who do not adhere to their ideology or support their inclinations.